Needle nozzle



May 1o, 1938.

G. W. BARBER NEEDLE NozzLE Filed Nov. 5, 1937 l. lllllllilllll E wm m5 C.. IM

ATTRNEYS .Patented May 10, 1938 sur-orner NEEDLE NQZZLE George W. Barber, Nev1 Haven, Conn.; dedicated to the freeuse of the People of the United States of America `Application November 5,1937, Serial No. 172,929 2 Claims. (Cl. 47-57) D (Granted under the act of March 3, 1883, as amended April 30, 1928; 370 0. G. 757) This application is made under the act of' States for governmental purposes without theV payment to me of any royalty thereon.

I hereby dedicate the invention 'herein described to the free use of the People of the United 'States of America to take eiect on the granting of a patent to me.

'I'his invention relates to aneedle nozzle and is more particularly concernedwith a needle nozzle adapted for use in spraying insecticides into ears l5 of corn, or any other plants or plant parts, in

combating the corn earworm, or any other-insect which feeds interiorly within such plants or plant parts.

The young larvae of the corn earworm begin their feeding among the internal silk threads of a corn ear. Insecticides such as sprays cannot be placed in this location with the equipment now available. Heretofore, it has been attempted to cause the spray to reach the part of the corn ear 25 mentioned by the use of spreading agents, whose function itis to cause the spray to run along the silk vthreads from the exterior where the spray can be placed with ordinary equipment to the in terior silk, where the young larvae begin feeding.

E@ The object of this invention is to make available equipment through the use of which insecticide sprays can be placed directly on the internal silks of corn, making certain that these sllks are thoroughly covered with an insecticide spray,

35 so that caterpillars, or other insects, feeding i therein will be killed. In this way the corn ear may be protected against injury by insects entering through the silk. One advantage of this invention is that the M; insecticide can be placed saliently in the corn silks Where it is surrounded by the husks, so that only a very small amount of spray material is necessary, at the same timeeliminating any waste of the insecticide through run-oil. Due to this economy insecticides can be used at greater concentrations than when applied externally, -thus increasing the-percentage of mortality of the insects.

Another advantage is that the insecticide can gp be placed directly where the insects feed within the silk of the corn ears, and one treatment can be made sufficient for any ear, as compared with several successive treatments of ears when the spray or dust is applied externally. w- Still another advantage is that by the use oi this invention, rain, dew, sun, and other natural factors which aiectinsecticides applied externally, do not affect the insecticide injected under the corn husk.

A further advantage in using this invention is that the wound or puncture made in the corn husks is not large enough to interfere with the further growth or appearance of the corn.

A still-further advantage is that by the use of this invention, smaller containers may be used to carry the spray material,.because of the economy y of the insecticide spray as above mentioned.`

The following specification, together with the accompanying drawing, will fully disclose this invention, and further objects and advantages thereof will be apparent. i

Referring with more particularity to the drawing, which discloses a longitudinal cross-sectional view of this invention, the numerals l, 2, 3 and il designate three hollow metallic sections connected in series, substantially as shown.` Disposed Within the sections I and 2 is an automatic cut-oil? valve consisting of a plunger rod 5, a plunger t secured to one end of said plunger rod,

a plunger'l seat and a plunger spring il com- 2") pressively mounted on said plunger rod between the plunger 6 and the wall 9 of said section l. The other end of the plunger rod 5 is secured to a vertical arm of the bent operating lever i, which lever is plvotally mounted on the bracket il. Said bracket H is a iixed part of the bent pipe l2, which pipe communicates with the interior of section l. The said pipe i2 extends rearward over the horizontal arm of the bent 3f, lever Hl, and is adapted to receive the end oa hose i3, which when in place forms a handle .for

`operating said lever lll.

At the other end of section d a reducing nipple M is inserted, which in turn carries a hollow 40 hypodermic needle i5, the tip of which is tapered to a point.

The following dimensions are recommended,` but are not deemed indispensable, for the hypodermic needle I5: 40 millimeters long and an over-all breadth of 2 millimeters with a central opening channel 1' millimeter in diameter.

The operation of this invention is as follows: The hose I3 is connected to a tank or other res- 5G ervoir containingl a suitable insecticide under suitable pressure. The hypodermic needle is then inserted through the husks of a corn ear. The lever I0 is then pressed toward the handle, which opens the valve by pulling plunger 6 away 55 from the plunger seat l against the fluid pressure of the insecticide and against the action of the spring 8. The opening of this valve permits Y tile lever l@ is released and the force of the fluid pressure of the insecticide, together with the spring Ei against the plunger 6 pushes the plunger back against the plunger seat 1, thereby automstically closing the valve and shutting oi the supply or the insecticide. f Heving thus described my invention, I claim:

l. in e, ndle nozzle insecticide ejector, a plurality or' progressively reduced sections in series attached, the largest section carrying a plunger, o plunger seat carried by the adjoining section, e.

hollow needle carried by the smallest section, a. handle constituting an intake pipe to said largest section, and a, lever for operating said plunger.

2. In a needle nozzle insecticide ejector, a, plurality of progressively reduced sections, in series attached, consisting of a plunger section, a. plunger seat section, a coupling section, and a nipple section, a. hypodermic needle carried by said nipple section, a plunger seat carried by said plunger seat section, a plunger normally seated in seid plunger seat, a spring compressibly mounted between said -plunger and said plunger section, a, plunger rod having one end securedto said plunger and its other end connected to en exterior operating lever, and a. means for introducing en lnsecticide into said plunger section.

GEORGE W. BARE. 

